Primary Navigation

Diagnosing missing mail

Hello all, We finally ditched postini for MailDistiller for our anti-spam service, and are mostly happy, but we re having a problem receiving certain emails

Message 1 of 2
, Jan 31, 2013

0 Attachment

Hello all,

We finally ditched postini for MailDistiller for our anti-spam
service, and are mostly happy, but we're having a problem receiving
certain emails from a site affiliated with our Bank of America
accounts...

Here is the headers for a message that did actually get through
today, but most of these just disappear into some black hole, and
MailDistiller tech support says they don't see any rejects in their
logs...

Why does mailout04 think it is mailout02 (mailout02 hostname is in
parenthesis following mailout04)?

Also, the time on that server appears to be very wrong - could that
also cause some kind of low-level reject, maybe even a firewall
dropping the connection?

Would appreciate someone who understand DNS better than me looking
at these hostnames and seeing if there is a serious enough problem
somewhere that could cause mail to disappear...

Thanks...

Wietse Venema

... Looking at mail that *is delivered* won t tell you what happened with mail that is lost. You need to find out which messages disappear down a black hole.

Message 2 of 2
, Jan 31, 2013

0 Attachment

Charles Marcus:

> Hello all,
>
> We finally ditched postini for MailDistiller for our anti-spam service,
> and are mostly happy, but we're having a problem receiving certain
> emails from a site affiliated with our Bank of America accounts...

Looking at mail that *is delivered* won't tell you what happened
with mail that is lost.

You need to find out which messages disappear down a black hole.

First, make sure local mail handling is sound: analyze Postfix logs
and find out if any received mail is not logged as delivered or
returned.

Second, mail may be lost up-stream. Set up a cron job that sends
one message each hour through your mail security provider, and look
at their arrival pattern: how much delay, how much never delivered.

Wietse

Your message has been successfully submitted and would be delivered to recipients shortly.